Self-update rollback option accepts a value, which is not very clear

[rjkip]

Self-update command's rollback option accepts a value, which is not very clear to the user. Only when the user specifies a truthy value is the rollback performed. It's expected to be a flag.

qa-tools/src/Core/Application/Command/SelfUpdateCommand.php

Line 31 in 6741de6

->addOption('rollback', null, InputOption::VALUE_NONE | InputOption::VALUE_OPTIONAL);

Specify only InputOption::VALUE_NONE.